I'm still finishing up an IKEA kitchen, but the last I checked there were no solid wood options any longer. Used to be for SEKTION (and the Euro equivalent) they even carried solid ash doors and drawer fronts, those were discontinued a couple years ago. There are solid bamboo fronts (but no doors).
The closest you'll get now are particleboard tops with "thick" veneer. VRENA and MÖLLEKULLA use "thick" oak veneer; KARLBY, BARKABODA, and PINNARP use a "thick" walnut veneer. Veneer being IKEA's choice of words, not mine. These have traditional laminate on the underside.
SKOGSÅ uses "thick" veneer on all sides but is still a particleboard core.
The closest you'll get now are particleboard tops with "thick" veneer. VRENA and MÖLLEKULLA use "thick" oak veneer; KARLBY, BARKABODA, and PINNARP use a "thick" walnut veneer. Veneer being IKEA's choice of words, not mine. These have traditional laminate on the underside.
SKOGSÅ uses "thick" veneer on all sides but is still a particleboard core.
SÄLJAN and EKBACKEN are laminate.
TOLKEN is solid bamboo (this must be new).